| 摘要 |
A valve timing control device includes a rotational shaft, a rotational torque transmitting member attached to the rotational shaft, a plurality of vanes each attached to the rotational shaft or the rotational torque transmitting device, a plurality of fluid chambers formed between the rotational shaft and the rotational torque transmitting device, a plurality of first chambers and second chambers, the fluid chambers each divided by means of each vane into each first chamber and each second chamber, a plurality of first fluid passages through each of which fluid is supplied to or drained from the each first chamber, a plurality of second fluid passages through each of which the fluid is supplied to or drained from the each second chamber, passage opening/closing device for opening/closing the first fluid passage or the second fluid passage, and chamber opening/closing device for opening/closing the first chamber and the second chamber.
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